2. Introduction : What is composite?
Why composite in Aerospace industry?
Applications of composite in aerospace
Future involvement of composite
Conclusion
3. o Composite is material consisting of two or more
materials, which have different physical and chemical
properties, combined together in a proper content and
fashion to produce a new material properties that are
different from the properties of those individual
materials.
4. The main aim of the aerospace/aircraft industries is to
reduce weight keeping the same or more strength
than the regular metals have.
This criteria leads to use composite.
5. Light weight
High heat resistance
High strength to weight ratio
Low density
Corrosion resistance
High stiffness
Fatigue resistance
9. Commercial :
o Boeing 777
o Boeing 787 “Dreamliner”
o Airbus A380
Military:
o B-2 Bomber
o LCA Tejas (HAL)
10. Components that uses composite
structure are:
◦ Horizontal Stabilizer
◦ Vertical Fin
◦ Radom
◦ Wing fairings
◦ Passenger floor beams
◦ Wing Box
◦ Engine Cowlings
◦ Engine fairings
Reduction in weight is over
5800 pounds.
11. Components that uses composite structure are:
◦ Almost full fuselage
◦ Upper and lower wing skin
◦ Radom
◦ Wing flaps, elevators, ailerons
◦ Vertical Fin and Horizontal Stabilizer
Use of composite is 80% by volume and 50% by weight.
12. Components that uses composite
structure are:
◦ Horizontal Stabilizer
◦ Vertical Fin
◦ Radom
◦ Wing Fairings
◦ Wing Box
◦ Belly Fairings
◦ Engine Cowlings
◦ Engine fairings
Wing box, made of CFRP, has reduced
weight up to one and a half tones.
13. B-2 Bomber is mostly made of
carbon/epoxy materials.
The reduction in weight was
about 40000 to 50000 pounds.
Design material was specially
designed to absorb radar
waves.
14. LCA stands for Light Combat Aircraft which is basically use of composite
materials in its structure.
Components which are made of composite material are:
◦ Nose
◦ Wing upper surface and leading edge
◦ Exit Nozzle
Weight is reduced by 21%
15. Used to manufacture Rocket and Missiles motor cases.
Materials for this are carbon, aramid and glass.
Composites like carbon-carbon are used to manufacture
re-entry nose tips and heat shields.
16. Use of composite is more challenging to design.
NDT test for composite material is much more difficult as
compared to metals.
Delamination of layers.
High cost
Damage tolerance.
Need specialized repair techniques.
17. Honeycomb Structure
Honeycomb Structure
Hybrid composite materials
Advanced Designs through
Simulation
Investigations into damage
tolerance of bonded repairs
by test and simulation.
18. Since the invention of composite materials, aerospace industry
has shown significant use of it in building different parts first
to almost most of the structural parts and use of it is rapidly
growing.
The main aspect we need to keep in mind that strength and
stiffness are major considerations for aircrafts whereas
stiffness and low coefficient of thermal expansion are major
considerations for space applications.
